title: Repair of left ventricular assist device driveline damage directly at the transcutaneous exit site.
abstract: With increasing support duration of cardiac assist devices, transcutaneous drivelines remain a weak point of the therapy. First, they can be an entry point for infections, and second, cable lesions and even electrical failures due to material fatigue and eventual carelessness can occur. We report a case of a damaged outer sheath of a ventricular assist device driveline cable directly at the exit site, where the standard repair procedure with self-fusing tape may lead to biocompatibility problems and irritation of the entrance through the skin. Therefore, a new procedure was developed using a special sleeve expander tool and a highly expandable latex tubing to stabilize the defect in a flexible and biocompatible manner. A patient experienced a fracture of the outer sheath of a HeartWare HVAD driveline directly at the skin entrance (approximately 15 mm long, 5 mm distal from the skin). The metal strands and the electrical functionality were yet not affected, therefore, a pump exchange was not indicated. After considering several conventional solutions for repair as not applicable, a new approach was developed: a sleeve expander tool was applied, which allowed radial stretching of the latex tubing. After preparations of the tool and the cable site, the pump was briefly disconnected, the tubing was moved over the connector and was released at the site of fracture. The problem could be solved by keeping the cable's flexibility and without additional risks to the skin. Within a still ongoing (5-month) follow-up, the skin entrance returned to perfect condition and no further intervention was necessary. In conclusion, this method allows a quick stabilization and repair of damaged driveline isolations even near the exit site, resulting in a biocompatible surface and consistent flexibility of the cable.
authors.affiliation: Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria; Department of Cardiac Surgery, Medical University of Vienna, Vienna, Austria; Ludwig-Boltzmann-Cluster for Cardiovascular Research, Vienna, Austria.
authors.forename: Heinrich
authors.initials: H
authors.lastname: Schima
authors.forename: Martin
authors.initials: M
authors.lastname: Stoiber
authors.forename: Thomas
authors.initials: T
authors.lastname: Schlöglhofer
authors.forename: Zeno
authors.initials: Z
authors.lastname: Hartner
authors.forename: Thomas
authors.initials: T
authors.lastname: Haberl
authors.forename: Daniel
authors.initials: D
authors.lastname: Zimpfer
mesh_terms: D000368:Aged; D006353:Heart-Assist Devices; D006439:Hemodynamics; D006801:Humans; D008297:Male; D011474:Prosthesis Design; D011475:Prosthesis Failure
keywords: Cable repair; Transcutaneous driveline; Ventricular assist device